ought to sing
Irregular verb: sing - sang- sung

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sing
you ought to sing
she ought to sing
we ought to sing
you ought to sing
they ought to sing 	I ought to be singing
you ought to be singing
she ought to be singing
we ought to be singing
you ought to be singing
they ought to be singing	I ought to have sung
you ought to have sung
she ought to have sung
we ought to have sung
you ought to have sung
they ought to have sung	I ought to have been singing
you ought to have been singing
she ought to have been singing
we ought to have been singing
you ought to have been singing
they ought to have been singing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sing
you oughtn't to sing
she oughtn't to sing
we oughtn't to sing
you oughtn't to sing
they oughtn't to sing 	I oughtn't to be singing
you oughtn't to be singing
she oughtn't to be singing
we oughtn't to be singing
you oughtn't to be singing
they oughtn't to be singing	I oughtn't to have sung
you oughtn't to have sung
she oughtn't to have sung
we oughtn't to have sung
you oughtn't to have sung
they oughtn't to have sung	I oughtn't to have been singing
you oughtn't to have been singing
she oughtn't to have been singing
we oughtn't to have been singing
you oughtn't to have been singing
they oughtn't to have been singing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sing?
ought to you sing?
ought to she sing?
ought to we sing?
ought to you sing?
ought to they sing? 	ought to I be singing?
ought to you be singing?
ought to she be singing?
ought to we be singing?
ought to you be singing?
ought to they be singing? 	ought to I have sung?
ought to you have sung?
ought to she have sung?
ought to we have sung?
ought to you have sung?
ought to they have sung? 	ought to I have been singing?
ought to you have been singing?
ought to she have been singing?
ought to we have been singing?
ought to you have been singing?
ought to they have been singing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sing?
oughtn't you to sing?
oughtn't she to sing?
oughtn't we to sing?
oughtn't you to sing?
oughtn't they to sing? 	oughtn't I to be singing?
oughtn't you to be singing?
oughtn't she to be singing?
oughtn't we to be singing?
oughtn't you to be singing?
oughtn't they to be singing? 	oughtn't I to have sung?
oughtn't you to have sung?
oughtn't she to have sung?
oughtn't we to have sung?
oughtn't you to have sung?
oughtn't they to have sung? 	oughtn't I to have been singing?
oughtn't you to have been singing?
oughtn't she to have been singing?
oughtn't we to have been singing?
oughtn't you to have been singing?
oughtn't they to have been singing?